7 replies to this topic

[natcamp10]

Hi all
I after some advise on how to identify a m20 xu1 gear box
Also aprrox value of one thats been rebuilt recently
The seller actually reached out to me as a fella i got some
Bits off near hm passed my number on , he was really helpful too
I Do really appreciate the offer
This is what i know
The input shaft has two groves in it just behind wear the spigot bearing runs
He is saying ratios ad follows
1st =252-1
2nd = 189-1
3rd= 146-1
4 no spec supplied
He has sent pics of inside the box of the clusters, the input shaft , numbers on shifter housing
And a pic of the output shaft
I have a standard m20 box which im gonna compare to when i get home
The bloke seems genuine i just dont know enough about the m20 xu1 gear box to know what to look for
Could one of you kind folks help me with some info
Am i able to see the cluster numbers with out disassembling the box via just looking inside as the shifter mechanism is out so i can inspect on weds
Are the any markings ect on the output shaft to look for
What numbers would be on the casing
Thanks heaps
All
Nath 👍

[yel327]

There is only two things different between a normal 6cyl M20 and an XU1 box, the input shaft and the cluster gear. Everything else is the same (other than design improvements/changes over time on the M20).

 

So all you need to look for is the drawing/part number on the cluster gear. It will end in 899 for an XU1 box.

 

From the description given and the ratios I assume measured it sounds like it has an XU1 input shaft (two grooves and 1st gear ratio of 2.54:1) but it is possible it also has an M21 cluster gear (3rd gear ratio 1.38)(part number ends in 497) which will work with an XU1 input shaft, but it means it will also have an M21 3rd gear.

[S pack]

Nathan, this link might help you.

https://www.gmh-tora...identification/

[natcamp10]

Thanks heaps all for the quick replays 

 

Would $1000 be over priced for an xu1 box ?, its been rebuilt , and has done very low kms since, internally the box looks great via pic , im inspecting tomorrow , anything i should know to look out for, 

[natcamp10]

Nathan, this link might help you.

https://www.gmh-tora...identification/

Thnakyou dave very helpful link, looks like its the real deal 

Thanks heaps all for the quick replays 

 

Would $1000 be over priced for an xu1 box ?, its been rebuilt , and has done very low kms since, internally the box looks great via pic , im inspecting tomorrow , anything i should know to look out for, 

I mean failure points etc , the info posted already should be enough to identify 

 

Thanks heaps all 

Edited by natcamp10, 05 September 2023 - 09:46 AM.

[S pack]

Repro XU1 input shaft - note it uses a neoprene oil seal instead of the original oil slinger + the part number on the repro gear is not 2823544.

 Repro 544 input shaft.jpg   205.56K   3 downloads

 

Repro XU1 899 cluster gear.

 Repro 899 Cluster gear 04.jpg   244.81K   2 downloads

 

IIRC a forum member has a repro XU1 cluster in his LJ gearbox that has part number 496 on it.

A batch must have been made and were stamped with the wrong part number.

[sibhs]

Thanks heaps all for the quick replays 

 

Would $1000 be over priced for an xu1 box ?, its been rebuilt , and has done very low kms since, internally the box looks great via pic , im inspecting tomorrow , anything i should know to look out for, 

I paid a $1000 just to get my box rebuilt and I supplied the parts.

[yel327]

It's hard to tell with the box all together. The major wear points are all inside and cannot be seen with the box together.

 

Remember an XU1 gearbox is just an aussie 4spd. They are all the same. If the input shaft and cluster are still serviceable, I guess they are worth more, but reality is they are probably stuffed by now and replaced with replica bits. If that is the case it's worth the same as any other aussie 4spd. The case might be dated right but so will any other 3 or 4spd case from that era. As Sibhs says though, nothing is cheap today - the labour and small parts to rebuild one is worth $1000. So if it has been rebuilt and has all good bits in it then $1000 is more than reasonable.